JP2010255688A - Vibration control device - Google Patents

Vibration control device Download PDF

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JP2010255688A
JP2010255688A JP2009104257A JP2009104257A JP2010255688A JP 2010255688 A JP2010255688 A JP 2010255688A JP 2009104257 A JP2009104257 A JP 2009104257A JP 2009104257 A JP2009104257 A JP 2009104257A JP 2010255688 A JP2010255688 A JP 2010255688A
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liquid chamber
diaphragm
partition member
cylindrical
inner peripheral
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JP5210956B2 (en
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Naoki Maeda
直樹 前田
Yuzo Hattori
優三 服部
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Bridgestone Corp
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Bridgestone Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration control device capable of improving durability while effectively reducing the number of part items. <P>SOLUTION: At least a liquid chamber 6 partitioned between a diaphragm 5 and a rubber elastic body 4 and sealed with liquid is divided into two parts in the axial direction of an outer cylinder, and is divided into a main liquid chamber 6a and a sub-liquid chamber 6b by a partition member 7. The partition member 7 is constituted of a rigid part and an elastic part. The rigid part has a flange 7a, a cylindrical part 7b and an inward flange 7c. The elastic part is connected to the inward flange 7c, and formed as a membrane 9 for fluid-tightly sealing the inner peripheral side of the inward flange 7c. The main liquid chamber 6a and the sub-liquid chamber 6b are made to communicate with each other by a restricting passage 8 mainly composed of a rigid material. A cylindrical rising part 5b of the diaphragm 5 is adhered to an inner peripheral surface of the restricting passage caulked and fixed to the inner peripheral side of at least the outer cylinder. A lower end peripheral edge 7d of the cylindrical part 7b of the partition member 7 is positioned under a lower end 8a of the restricting passage 8. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、例えば、自動車のエンジン等の振動発生部の振動の、振動伝達側としての車体への伝達を、ゴム弾性体の変形および封入液体の流動をもって抑制し、吸収する防振装置に関するものであって、特に装置の耐久性を高める技術を提案するものである。   The present invention relates to a vibration isolator that suppresses and absorbs vibration of a vibration generating part of an automobile engine or the like to a vehicle body as a vibration transmission side by deformation of a rubber elastic body and flow of an enclosed liquid, for example. Therefore, a technique for improving the durability of the apparatus is proposed.

この種の液入り防振装置では、内外筒金具間でダイヤフラムとゴム弾性体との間に区画されて液体を封入された液室を、仕切部材によって、内外筒金具の軸線方向に二分割して主液室と副液室とに区分し、そして、これらの両液室を、仕切部材とは別体になって、剛性材料を主体とする制限通路によって相互に連通させることが広く一般に行われている。
このような防振装置では、内筒金具もしくは外筒金具のいずれか一方を連結した振動発生部から入力される振動は、ゴム弾性体の変形によって吸収される他、主・副液室内の液体が、液室の圧力変化に基づいて、制限通路を経て、それらの間で流動することによる液柱共振、流動抵抗等によって減衰されることになるので、他方の金具を連結した振動伝達側への振動の伝達は有効に防止されることになる。 In this type of anti-vibration device with liquid, the liquid chamber, which is partitioned between the diaphragm and the rubber elastic body between the inner and outer cylindrical fittings and filled with liquid, is divided into two in the axial direction of the inner and outer cylindrical fittings by the partition member. In general, the main liquid chamber and the sub liquid chamber are divided into two, and these two liquid chambers are separated from the partition member and communicated with each other by a restriction passage mainly composed of a rigid material. It has been broken.
In such an anti-vibration device, vibrations input from a vibration generating unit connected to either the inner tube fitting or the outer tube fitting are absorbed by deformation of the rubber elastic body, and the liquid in the main / sub liquid chambers Is attenuated by the liquid column resonance, flow resistance, etc. caused by flowing between them through the restricting passage based on the pressure change of the liquid chamber, so that the vibration transmission side connected to the other metal fitting The transmission of vibration is effectively prevented.

ところで、このような防振装置において、多くはゴム製のダイヤフラムの筒状立上がり部分を、制限通路の内周面に接着させる場合には、ダイヤフラムの、液室を拡縮する向きの変形に伴って接着部に発生する、特に横方向内向きの力に起因して、ダイヤフラムが、制限通路の下端部分から離隔する向きの分力を受けることになるため、ダイヤフラムの筒状立上がり部分が、制限通路から離隔するおそれがある。これがため、制限通路からの液漏れや、ダイヤフラムの拘束力が低下することから、特許文献１，２に開示されているように、制限通路の下端部分に、ダイヤフラムに埋め込み配置した金属リングそれ自体が制限通路に加硫接着させたり、または、図４に示すように、制限通路２８の下端部分２８ａに、肉厚に形成したダイヤフラム２５の筒状立ち上がり部分２５ｂを加硫接着させて、制限通路２８によるダイヤフラム２５の拘束力を高め、ダイヤフラム２５に作用する制限通路２８から離隔する方向の力を緩和し、また、制限通路２８への、ダイヤフラム２５の筒状立ち上がり部分２５ｂの接着面積を増加させて、離隔する方向の力の分散を図っていた。   By the way, in such a vibration isolator, when the cylindrical rising portion of a rubber diaphragm is bonded to the inner peripheral surface of the restriction passage, the diaphragm is deformed in the direction of expanding and contracting the liquid chamber. Because the diaphragm receives a component force in the direction away from the lower end portion of the restriction passage due to the inward force generated in the adhesive portion in particular, the cylindrical rising portion of the diaphragm is restricted to the restriction passage. There is a risk of separation. For this reason, since the liquid leakage from the restriction passage and the restraining force of the diaphragm are reduced, as disclosed in Patent Documents 1 and 2, the metal ring itself embedded in the diaphragm at the lower end portion of the restriction passage itself 4 is vulcanized and bonded to the restriction passage, or, as shown in FIG. 4, the tubular rising portion 25b of the diaphragm 25 formed thick is vulcanized and bonded to the lower end portion 28a of the restriction passage 28, and the restriction passage 28 28 increases the restraining force of the diaphragm 25 by the pressure 28, relaxes the force in the direction away from the restriction passage 28 acting on the diaphragm 25, and increases the adhesion area of the cylindrical rising portion 25b of the diaphragm 25 to the restriction passage 28. Thus, the force in the direction of separation was distributed.

しかるに、これらの従来技術にあっては、仕切部材および制限通路の他、それとは別体になる金属リングや、ダイヤフラムの肉厚部分を必要になることから、部品点数の増加の他、重量の増加が否めなかった。   However, in these prior arts, in addition to the partition member and the restricting passage, a metal ring and a thick part of the diaphragm are required separately. The increase could not be denied.

特開平１０−２５２８２８号公報JP-A-10-252828 特開２００７−２１８２７２号公報JP 2007-218272 A

そこで、本発明は、部品点数を有効に低減させるとともに、耐久性を向上させることができる防振装置を提供することを目的とする。   Therefore, an object of the present invention is to provide a vibration isolator capable of effectively reducing the number of parts and improving durability.

この発明の防振装置は、振動の発生側および伝達側のそれぞれに取付けられる剛性部材のいずれか一方をコア部材、他方を外筒とし、この外筒の一端部を、ゴム弾性体によってコア部材の外周面に液密に連結するとともに、その外筒の他端をダイヤフラムによって液密に封止して、少なくとも、ダイヤフラムとゴム弾性体との間に区画されて液体を封入された液室を、仕切部材によって、外筒の軸線方向に二分割して主液室と副液室とに区分し、その仕切部材を剛性部分と弾性部分とで構成し、この剛性部分が、フランジ部、筒状部および内向フランジ部を有するものととともに、弾性部分を内向フランジ部に連結されて、内向フランジ部の内周側を液密に封止するメンブランとし、主液室と副液室とを、剛性材料を主体とする制限通路によって連通させるものであって、ダイヤフラムの筒状立ち上がり部分を、少なくとも外筒の内周側に、かしめ固定される制限通路の内周面に接着させるとともに、仕切部材の筒状部の下端周縁部を、制限通路の下端部分より下方に位置させてなるものである。   According to the vibration isolator of the present invention, either one of the rigid members attached to the vibration generation side and the transmission side is a core member, and the other is an outer cylinder, and one end portion of the outer cylinder is a core member by a rubber elastic body. Liquid-tightly connected to the outer circumferential surface of the outer cylinder, and the other end of the outer cylinder is liquid-tightly sealed with a diaphragm, and at least a liquid chamber partitioned between the diaphragm and the rubber elastic body and filled with liquid is provided. The partition member is divided into two in the axial direction of the outer cylinder, and is divided into a main liquid chamber and a sub liquid chamber, and the partition member is composed of a rigid portion and an elastic portion. And a member having an inward flange portion, an elastic portion connected to the inward flange portion, and a membrane that liquid-tightly seals the inner peripheral side of the inward flange portion, and the main liquid chamber and the auxiliary liquid chamber, By restricted passages mainly composed of rigid materials The cylindrical rising portion of the diaphragm is bonded to the inner peripheral surface of the restriction passage that is caulked and fixed to at least the inner peripheral side of the outer cylinder, and the lower peripheral edge of the cylindrical portion of the partition member Is positioned below the lower end portion of the restriction passage.

ここで好ましくは、ダイヤフラムの筒状立ち上がり部分を、仕切部材の筒状部外周面に密着させてなる。   Preferably, the cylindrical rising portion of the diaphragm is in close contact with the outer peripheral surface of the cylindrical portion of the partition member.

本発明の防振装置は、仕切部材の筒状部の下端周縁部を、制限通路の下端部分より下方に位置させることで、ダイヤフラムの変形に伴う、それの筒状立上がり部分の、制限通路の下端部分から離隔する方向の力、なかでも、ダイヤフラムの筒状立上がり部分の半径方向内方に向く、横方向内向きの力を、仕切部材の筒状部で抑制することができる。その結果、制限通路の下端部分に金属リングやダイヤフラムの肉厚部分等を設けることなく、すなわち部品点数、重量等の増加なしに、防振装置の耐久性を向上させることができる。   The vibration isolator of the present invention is such that the lower peripheral edge of the cylindrical portion of the partition member is positioned below the lower end portion of the restricting passage, so that the cylindrical rising portion of the restricting passage of the diaphragm rises along with the deformation of the diaphragm. The force in the direction away from the lower end portion, in particular, the inward force in the transverse direction toward the radially rising portion of the tubular rising portion of the diaphragm can be suppressed by the tubular portion of the partition member. As a result, it is possible to improve the durability of the vibration isolator without providing a metal ring or a thickened portion of the diaphragm at the lower end portion of the restriction passage, that is, without increasing the number of parts, weight, and the like.

また、ダイヤフラムの筒状立ち上がり部分を、少なくとも外筒の内周側に、かしめ固定される制限通路の内周面に、加硫その他によって接着させることで、ダイヤフラムそれ自体の位置決め保持を確実なものとするとともに、十分強固なものとすることができる。   In addition, the positioning of the diaphragm itself is ensured by adhering the cylindrical rising part of the diaphragm at least to the inner peripheral side of the outer cylinder to the inner peripheral surface of the restricted passage fixed by caulking. And sufficiently strong.

本発明の一の実施形態を示す縦断面図である。It is a longitudinal section showing one embodiment of the present invention. 図２は、図１の要部拡大断面図である。FIG. 2 is an enlarged cross-sectional view of a main part of FIG. 本発明の他の実施形態を示す要部拡大断面図である。It is a principal part expanded sectional view which shows other embodiment of this invention. 従来の実施形態を示す要部拡大断面図である。It is a principal part expanded sectional view which shows the conventional embodiment.

図１は、本発明の一の実施形態を示す縦断面図であり、図２は、図１の要部拡大断面図である。
図中１は、防振装置を、２は剛性コア部材の一例としてのコア金具を、３は、コア金具２と同心に配置した、剛性外筒の一例としての外筒金具をそれぞれ示す。
ここにおけるコア金具２は、多くの場合、筒部の中央部分に、雌ねじが形成されたねじ穴を設けて振動発生側、例えば自動車等のエンジンに連結され、外筒金具３は、多くは、筒状ホルダーを介して振動伝達側、例えば自動車等の車体に連結される。 FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of a main part of FIG.
In the figure, 1 is a vibration isolator, 2 is a core fitting as an example of a rigid core member, and 3 is an outer cylinder fitting as an example of a rigid outer cylinder arranged concentrically with the core fitting 2.
In many cases, the core metal fitting 2 here is provided with a screw hole in which a female screw is formed in the center portion of the cylinder portion and connected to a vibration generating side, for example, an engine such as an automobile. It is connected to a vibration transmission side, for example, a vehicle body such as an automobile through a cylindrical holder.

ここでは、外筒金具３の一方の端部側で、それの内周面および、コア金具２の外周面のそれぞれに、ほぼ円筒形状をなすゴム弾性体４を加硫接着させて、このゴム弾性体４によって液室空間の一部を区画する。
なおこの図では、ゴム弾性体４の下端部分を、外筒金具３の内周面を覆う薄肉部４ａとしているが、この薄肉部４ａは省くことも可能であり、また、図に示すところでは、ゴム弾性体４をもって、コア金具２の下端面まで覆うこととしているも、コア金具２の下端部はゴム弾性体４から露出させることも可能である。 Here, a rubber elastic body 4 having a substantially cylindrical shape is vulcanized and bonded to each of the inner peripheral surface of the outer cylindrical metal fitting 3 and the outer peripheral surface of the core metal fitting 2, and this rubber is attached. A part of the liquid chamber space is partitioned by the elastic body 4.
In this figure, the lower end portion of the rubber elastic body 4 is a thin portion 4a that covers the inner peripheral surface of the outer cylindrical fitting 3. However, this thin portion 4a can be omitted, and in the drawing, Although the rubber elastic body 4 is used to cover the lower end surface of the core metal fitting 2, the lower end portion of the core metal fitting 2 can be exposed from the rubber elastic body 4.

またここでは、ゴム製のダイヤフラム５の筒状立ち上がり部分５ｂの上端を、ゴム弾性体４の薄肉部４ａに接着して、図では、このダイヤフラム５とゴム弾性体４との間には水、シリコーンオイル、アルキレングリコール等の所要の液体を液密に封入した液室６を形成する。
この液室６を、例えば、ゴム材料と金属材料からなる仕切部材７によって、外筒金具３の軸線方向に二分割して主液室６ａと副液室６ｂとに区分する。 Further, here, the upper end of the cylindrical rising portion 5b of the rubber diaphragm 5 is bonded to the thin portion 4a of the rubber elastic body 4, and in the figure, water is interposed between the diaphragm 5 and the rubber elastic body 4. A liquid chamber 6 in which a required liquid such as silicone oil or alkylene glycol is sealed in a liquid-tight manner is formed.
The liquid chamber 6 is divided into two in the axial direction of the outer tube fitting 3 by a partition member 7 made of, for example, a rubber material and a metal material, and is divided into a main liquid chamber 6a and a sub liquid chamber 6b.

そして、これらの両液室６ａ，６ｂを、仕切部材７とは別体になって、剛性材料、例えば、金属、熱硬化性樹脂、熱可塑性樹脂等の剛性部材を主体とする制限通路８によって連通させる。この制限通路８は、断面形状がチャンネル状をなす環状剛性材料を、外筒金具３の内周面に沿って全周にわたって、直接的にまたは、図示のように、薄肉部４ａを介して間接的に、外筒金具３のかしめ固定等することによって構成することができる。   The two liquid chambers 6a and 6b are separated from the partition member 7 by a restricting passage 8 mainly composed of a rigid member such as a rigid material such as a metal, a thermosetting resin, or a thermoplastic resin. Communicate. The restricting passage 8 is formed by applying an annular rigid material whose cross-sectional shape is a channel shape, either directly or indirectly through the thin-walled portion 4a as shown in the figure, along the inner peripheral surface of the outer tube fitting 3. In particular, it can be configured by caulking and fixing the outer tube fitting 3.

図１，２では、金属材料等の剛性部分と、ゴムその他の弾性部分からなる仕切部材７は、制限通路８とゴム弾性体４との間に挾持されるリング状のフランジ部７ａと、このフランジ部７ａに連続して図の下方側へ突出する筒状部７ｂと、この筒状部７ｂの先端の、図では下端に形成した内向フランジ部７ｃからなる剛性部分と、この内向フランジ部７ｃに連結されて、内向フランジ部７ｃの開口を閉止する弾性部材からなるメンブラン９で構成してなる。   1 and 2, the partition member 7 formed of a rigid portion such as a metal material and rubber or other elastic portion includes a ring-shaped flange portion 7 a held between the restriction passage 8 and the rubber elastic body 4. A cylindrical portion 7b that protrudes downward in the figure continuously from the flange portion 7a, a rigid portion including an inward flange portion 7c formed at the lower end in the drawing at the tip of the cylindrical portion 7b, and the inward flange portion 7c And a membrane 9 made of an elastic member that closes the opening of the inward flange portion 7c.

ところで、この仕切部材７の、筒状部７ｂの下端部は、ダイヤフラム５の可撓部分ないしは弾性変形部分５ａより肉厚にした厚肉肩部５ｃによっても位置決め支持することもできる。
また、仕切部材７はゴム弾性体４の薄肉部４ａの内周面に挟み込ませて軸方向の位置決め支持する。
そしてまた、例えば、ダイヤフラム５をスチレン−ブタジエン系ゴムで、制限通路８をポリフェニレンエーテル樹脂で形成する場合には、それらの両者を加硫接着することにより、拡散接着により、接着剤なしに、十分強固に接着させることができる。 By the way, the lower end portion of the cylindrical portion 7b of the partition member 7 can be positioned and supported also by a thick shoulder portion 5c thicker than the flexible portion or the elastically deformable portion 5a of the diaphragm 5.
Further, the partition member 7 is sandwiched between the inner peripheral surfaces of the thin-walled portion 4a of the rubber elastic body 4 to support the positioning in the axial direction.
For example, when the diaphragm 5 is made of styrene-butadiene rubber and the restriction passage 8 is made of polyphenylene ether resin, both of them are vulcanized and bonded to each other by diffusion bonding and without an adhesive. It can be firmly bonded.

このような防振装置１では、コア金具２または外筒金具３のいずれか一方に連結された振動発生部から入力された振動は、ゴム弾性体４の変形によって吸収される他、主・副液室内の液体が、圧力変化に基づいて、制限通路８を経て、それらの間で流動することによる液柱共振、流動抵抗等によって減衰されることになるので、他方の部材が防振されるのは振動伝達側に連結された十分に防振されることになる。   In such a vibration isolator 1, the vibration input from the vibration generating unit connected to either the core metal fitting 2 or the outer cylinder metal fitting 3 is absorbed by deformation of the rubber elastic body 4, and The liquid in the liquid chamber is attenuated by liquid column resonance, flow resistance, and the like caused by flowing between them through the restriction passage 8 based on the pressure change, so that the other member is vibrated. This will be sufficiently vibration-proof connected to the vibration transmission side.

この一方で、高周波の振動が入力されて、制限通路８が目詰まり状態となって、封入液体のそこへの流動が不能となった場合は、メンブラン９が、例えば弾性変形下で振動することで、液室内圧の異常な増加を防止するので、ゴム弾性体４の変形に基づく防振機能は依然として発揮することができ、動ばね定数を十分に低く抑えることができる。   On the other hand, when high-frequency vibration is input and the restriction passage 8 becomes clogged and the flow of the sealed liquid becomes impossible, the membrane 9 vibrates under elastic deformation, for example. Thus, since an abnormal increase in the pressure in the liquid chamber is prevented, the anti-vibration function based on the deformation of the rubber elastic body 4 can still be exhibited, and the dynamic spring constant can be suppressed sufficiently low.

そしてこの防振装置１ではさらに、ダイヤフラム５の筒状立ち上がり部分５ｂを、図では制限通路８の内周面に接着させるとともに、仕切部材７のフランジ部７ａおよび筒状部７ｂとの間に挾着し、仕切部材７の筒状部７ｂの下端周縁部７ｄを、制限通路８の下端部分８ａより下方に位置させる。   Further, in the vibration isolator 1, the cylindrical rising portion 5b of the diaphragm 5 is adhered to the inner peripheral surface of the restriction passage 8 in the drawing, and the flange portion 7a and the cylindrical portion 7b of the partition member 7 are sandwiched between the flange portion 7a and the cylindrical portion 7b. The lower end peripheral portion 7d of the cylindrical portion 7b of the partition member 7 is positioned below the lower end portion 8a of the restriction passage 8.

なおここで、ダイヤフラム５それ自体は、筒状立ち上がり部分５ｂを、外筒金具３の内周面に固定される制限通路８、より直接的には仕切部材７のフランジ部７ａが係合して加硫その他によって接着して軸方向の位置決め支持させることで、外筒金具３の下端を、制限通路８の介在下で、液密に封止することができる。   Here, the diaphragm 5 itself engages with the cylindrical rising portion 5b by the restriction passage 8 fixed to the inner peripheral surface of the outer cylinder fitting 3, more directly, the flange portion 7a of the partition member 7. By bonding by vulcanization or the like and supporting the positioning in the axial direction, the lower end of the outer cylinder fitting 3 can be liquid-tightly sealed under the restriction passage 8.

図３は、本発明の他の実施形態を示す縦断面の要部拡大断面図である。
この防振装置において好ましくは、ダイヤフラム１５と制限通路１８を、二色成型により一体成形する。
この構成により制限通路１８の脱脂工程が不要となるとともに、シボ形成を行うことでショットブラストを行わなくとも、充分な接触面積とアンカー効果を得ることができる。また、制限通路１８の内周面にダイヤフラム１５の設置を簡易に行うことができ、装置の製造および組付けの手間を大幅に削減できるとともに、軽量化をも実現することができる。 FIG. 3 is an enlarged cross-sectional view of an essential part of a longitudinal section showing another embodiment of the present invention.
In this vibration isolator, preferably, the diaphragm 15 and the restriction passage 18 are integrally formed by two-color molding.
With this configuration, the degreasing process of the restriction passage 18 is not necessary, and a sufficient contact area and an anchor effect can be obtained by forming the texture without performing shot blasting. In addition, the diaphragm 15 can be easily installed on the inner peripheral surface of the restriction passage 18, and the labor for manufacturing and assembling the apparatus can be greatly reduced, and the weight can be reduced.

二色成型は、先ずはじめに樹脂材料を断面形状がチャンネル状をなす環状に注入して制限通路１８を形成し、その内周面には、型成形時にシボ加工を施す。その後、制限通路１８の内周面にゴム材料を注入してダイヤフラム１５を形成する。   In the two-color molding, first, a resin material is injected into an annular shape whose cross-sectional shape forms a channel shape to form the restriction passage 18, and the inner peripheral surface thereof is subjected to embossing at the time of molding. Thereafter, a rubber material is injected into the inner peripheral surface of the restriction passage 18 to form the diaphragm 15.

このような防振装置おいてより好ましくは、ダイヤフラム５、１５の筒状立ち上がり部分５ｂ，１５ｂを、仕切部材の筒状部外周面に密着させた場合には、ダイヤフラムそれ自体の位置決め保持を確実なものとするとともに、十分強固なものとすることができる。   In such a vibration isolator, more preferably, when the cylindrical rising portions 5b and 15b of the diaphragms 5 and 15 are brought into close contact with the outer peripheral surface of the cylindrical part of the partition member, the positioning and holding of the diaphragms are surely ensured. And sufficiently strong.

好ましくは、仕切部材７，１７の筒状部７ｂ，１７ｂと対応する下端周縁部７ｄ，１７ｄを、ダイヤフラム５，１５の、変形部分より肉厚の厚肉肩部５ｃ，１５ｃによって支持することで、仕切部材７，１７の位置決め保持を、上下の二個所の保持によってより強固なものとすることができる。   Preferably, lower end peripheral edge portions 7d and 17d corresponding to the cylindrical portions 7b and 17b of the partition members 7 and 17 are supported by thick shoulder portions 5c and 15c of the diaphragms 5 and 15 which are thicker than the deformed portions. The positioning and holding of the partition members 7 and 17 can be made stronger by holding the upper and lower portions.

ところで、仕切部材を、全体がゴム材料からなり、挾持固定用のフランジ部と、筒状部と、メンブランとして機能する薄膜頂壁とを有する一体構造物とすることで、防振装置の部品点数および重量の低減を実現するとともに、部品の組付けのための作業工程および工数を不要とすることや、仕切部材とダイヤフラムを、二色成型により一体成形するがことでき、さらには、異音の発生のおそれを十分に取り除くことができる。   By the way, the partition member is made of a rubber material as a whole, and is an integral structure having a flange portion for holding and fixing, a cylindrical portion, and a thin film top wall functioning as a membrane, so that the number of parts of the vibration isolator is increased. In addition, it is possible to reduce the weight, eliminate the need for work steps and man-hours for assembling the components, and the partition member and the diaphragm can be integrally formed by two-color molding. The possibility of occurrence can be removed sufficiently.

１ 防振装置
２ コア金具
３ 外筒金具
４ ゴム弾性体
４ａ 薄肉部
５，１５ ダイヤフラム
５ａ 弾性変形部分
５ｂ，１５ｂ，２５ｂ 筒状立ち上がり部分
５ｃ，１５ｃ，２５ｃ
６ 液室
６ａ 主液室
６ｂ 副液室
７，１７ 仕切部材
７ａ フランジ部
７ｂ 筒状部
７ｃ 内向フランジ部
７ｄ，１７ｄ 下端周縁部
８，１８，２８ 制限通路
８ａ，２８ａ 下端部分
９ メンブラン DESCRIPTION OF SYMBOLS 1 Vibration isolator 2 Core metal fitting 3 Outer cylinder metal fitting 4 Rubber elastic body 4a Thin part 5,15 Diaphragm 5a Elastic deformation part 5b, 15b, 25b Cylindrical rising part 5c, 15c, 25c
6 Liquid chamber 6a Main liquid chamber 6b Sub liquid chamber 7, 17 Partition member 7a Flange portion 7b Tubular portion 7c Inward flange portion 7d, 17d Lower peripheral edge portion 8, 18, 28 Restricted passage 8a, 28a Lower end portion 9 Membrane

Claims (2)

振動の発生側および伝達側のそれぞれに取付けられる剛性部材のいずれか一方をコア部材、他方を外筒とし、この外筒の一端部を、ゴム弾性体によってコア部材の外周面に液密に連結するとともに、その外筒の他端をダイヤフラムによって液密に封止して、少なくとも、ダイヤフラムとゴム弾性体との間に区画されて液体を封入された液室を、仕切部材によって、外筒の軸線方向に二分割して主液室と副液室とに区分し、その仕切部材を剛性部分と弾性部分とで構成し、この剛性部分が、フランジ部、筒状部および内向フランジ部を有するものととともに、弾性部分を内向フランジ部に連結されて、内向フランジ部の内周側を液密に封止するメンブランとし、主液室と副液室とを、剛性材料を主体とする制限通路によって連通させる防振装置であって、
ダイヤフラムの筒状立ち上がり部分を、少なくとも外筒の内周側に、かしめ固定される制限通路の内周面に接着させるとともに、仕切部材の筒状部の下端周縁部を、制限通路の下端部分より下方に位置させてなる防振装置。 Either one of the rigid members attached to the vibration generation side and the transmission side is a core member, and the other is an outer cylinder. One end of the outer cylinder is liquid-tightly connected to the outer peripheral surface of the core member by a rubber elastic body. In addition, the other end of the outer cylinder is liquid-tightly sealed with a diaphragm, and at least a liquid chamber partitioned between the diaphragm and the rubber elastic body and filled with the liquid is separated by a partition member. Divided into an axial direction and divided into a main liquid chamber and a sub liquid chamber, and the partition member is composed of a rigid portion and an elastic portion, and this rigid portion has a flange portion, a cylindrical portion, and an inward flange portion. The elastic part is connected to the inward flange part together with the membrane, and the inner peripheral side of the inward flange part is liquid-tightly sealed, and the main liquid chamber and the auxiliary liquid chamber are restricted passages mainly composed of a rigid material. Anti-vibration device communicated by There,
The cylindrical rising portion of the diaphragm is adhered to the inner peripheral surface of the restriction passage that is caulked and fixed at least on the inner peripheral side of the outer cylinder, and the lower peripheral edge of the cylindrical portion of the partition member is connected to the lower end portion of the restriction passage. An anti-vibration device located below. ダイヤフラムの筒状立ち上がり部分を、仕切部材の筒状部外周面に密着させてなる請求項１に記載の防振装置。   The vibration isolator according to claim 1, wherein the cylindrical rising portion of the diaphragm is brought into close contact with the outer peripheral surface of the cylindrical portion of the partition member.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10227328A (en) * 1997-02-14 1998-08-25 Nok Megurasutikku Kk Liquid sealed type mount and assembling method thereof
JP2005282662A (en) * 2004-03-29 2005-10-13 Nok Corp Liquid sealed mount
JP2006170271A (en) * 2004-12-14 2006-06-29 Nok Corp Liquid sealing type mount and its manufacturing method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10227328A (en) * 1997-02-14 1998-08-25 Nok Megurasutikku Kk Liquid sealed type mount and assembling method thereof
JP2005282662A (en) * 2004-03-29 2005-10-13 Nok Corp Liquid sealed mount
JP2006170271A (en) * 2004-12-14 2006-06-29 Nok Corp Liquid sealing type mount and its manufacturing method

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